Do NOT pop your cold sore!! The stuff inside the cold sore is what makes it spread. I use Tea Tree oil, it dries the infection out pretty quickly & it's cheap. I hope it clears up for you soon, cold sores are so annoying.
Tea..... Make tea. Take out the tea bag and put it in the freezer.... Once it's froze. Stick it on your lip!!!! Also goto the store and get L Lysine vitamins..... Take one in the morning and one at night.... It will be gone within two to three days.
Using Abreva didn't help me AT ALL. Don't waste your money. Only thing that I've found that works is camphor spirits. Not Campho-phenique (sp?). CS comes in a little brown bottle usually, and it's sort of hard to find, but a lot of pharmacies will have it. You put it on a q-tip and hold it on the blister until it starts to burn. I just want it gone, so I hold it even if it burns a little too much. Probably works like tea tree oil, I'm sure. It dries it up and cuts the healing time in half, usually. I've even made them go completely away if I've caught them early enough using that stuff. After using that for a day or so, I follow up with the lip balm called Herpecin-L (L as in Lysine). It'll make your lips sort of peel, but it also speeds up recover. Doing this usually makes it a 7-8 day affair instead of 10-12.